1 files changed, 118 insertions, 0 deletions
diff --git a/examples/baremetal/cy7c68013a/nes-gamepads/usb.c b/examples/baremetal/cy7c68013a/nes-gamepads/usb.c
new file mode 100644
index 000000000..59a008dee
--- /dev/null
+++ b/examples/baremetal/cy7c68013a/nes-gamepads/usb.c
@@ -0,0 +1,118 @@
+/****************************************************************************
+**
+** Copyright (C) 2019 Denis Shienkov <denis.shienkov@gmail.com>
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the examples of Qbs.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** BSD License Usage
+** Alternatively, you may use this file under the terms of the BSD license
+** as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of The Qt Company Ltd nor the names of its
+**     contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "core.h"
+#include "hid.h"
+#include "usb.h"
+
+void usb_init(void)
+{
+    // Disable all USB interrupts.
+    USBIE = 0;
+    sync_delay();
+    // Disable all end point interrupts.
+    EPIE = 0;
+    sync_delay();
+    // Disable all end point ping-nak interrupts.
+    NAKIE = 0;
+    sync_delay();
+    // Disable all USB error interrupts.
+    USBERRIE = 0;
+    sync_delay();
+    // Disable USB && GPIF autovectoring.
+    INTSETUP = 0;
+    sync_delay();
+    // Clear USB interrupt requests.
+    USBIRQ = bmSUDAV | bmSOF | bmSUTOK | bmSUSP
+            | bmURES | bmHSGRANT | bmEP0ACK;
+    sync_delay();
+    // Clear end point interrupt requests.
+    EPIRQ = bmEP0IN | bmEP0OUT | bmEP1IN | bmEP1OUT
+            | bmEP2 | bmEP4 | bmEP6 | bmEP8;
+    sync_delay();
+    // Set USB interrupt to high priority.
+    PUSB = 1;
+    sync_delay();
+    // Enable USB interrupts.
+    EUSB = 1;
+    sync_delay();
+    // As we use SOFs to detect disconnect we have
+    // to disable SOF synthesizing.
+    USBCS |= bmNOSYNSOF;
+    sync_delay();
+
+    hid_init();
+
+    // Disable FX2-internal enumeration support.
+    USBCS |= bmRENUM;
+    sync_delay();
+}
+
+void usb_task(void)
+{
+    if (USBIRQ & bmSUDAV) {
+        USBIRQ = bmSUDAV;
+        hid_ep0_setup_task();
+    }
+
+    if (USBIRQ & bmEP0ACK) {
+        USBIRQ = bmEP0ACK;
+    }
+
+    if (USBIRQ & bmURES) {
+        USBIRQ = bmURES;
+    }
+
+    if (USBIRQ & bmSUSP) {
+        USBIRQ = bmSUSP;
+    }
+
+    hid_ep1_task();
+}